Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e6a0f9547a0f388…

MALICIOUS

PDF

33.5 KB Created: 2021-06-19 16:21:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b1c0993a6807bea3d89515b0496966bc SHA-1: fa9043c3c03605ff4a5e238a2f0211484f4dcf4a SHA-256: 9e6a0f9547a0f388da22a4e4bf0702664a18a163806bf50394f0abab3b3a5b3a
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded URLs, many of which are related to game exploits and cheats for popular games like Roblox and Coin Master. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract users. The ML classifier also flagged the document as malicious with high confidence. The presence of a 'download button' lure further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.co/app/431946152/roblox-report-hacker-game-hack
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-spins-link-2021_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-spins-facebook_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-hack-apk-free-download_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-spins-for-coin-master-app_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-hack-account-script_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-hack-dangongusee-roblox_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-robux-live_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-card-hack-apk_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-hack-unlimited-robux-free_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/robux-hack-app_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-use-noclip-hacks-roblox-2021-november_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-robux-actually-works-2021_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-robux-without-doing-anything_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-ways-to-get-robux_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/optifine-pe_GM479516143.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-spins-link-today-facebook_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/apps-to-get-free-robux_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-hacks-no-down-load_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002df2.bin
b780d58c1cb04f8519cb462ff99cc7f3ca0447610208946e378e113df5356309		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2DF2 21712 bytes
font_01_sfnt_off00005dcb.bin
e792f80aad638b76d16f7c8bc2402453b770eaccb091489bd05380a50e304efa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DCB 18936 bytes

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